US2580123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay
Assignee: AT&T Inc
•
Filing: 1945-07-04
•
Granted: 1951-12-25
•
Expires: 1965-07-04
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Pfleger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:16
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/22; H01H51/2272; H01H51/2281; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US909651A
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US1298701A
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US1510138A
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US1624476A
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US1680667A
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US1931267A
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US1955141A
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US2140139A
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US2203727A
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US2356229A
Cited
US2412914A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |